Home / 20,631.60-30,943.80-7,477.20

Finding the Fourth Proportional to 20,631.60, 30,943.80 and 7,477.20

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Solution

The fourth proportional to 20,631.60, 30,943.80 and 7,477.20 is: 11,214.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.60 : 30,943.80 = 7,477.20 : x
  2. Step 2: Convert to fraction form
    20,631.60/30,943.80 = 7,477.20/x
  3. Step 3: Cross multiply
    20,631.60x = 30,943.80 × 7,477.20
  4. Step 4: Simplify right side
    20,631.60x = 231,372,981.36
  5. Step 5: Solve for x
    x = 231,372,981.36/20,631.60
  6. Step 6: Final answer
    x = 11,214.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.